Our border terrier cross is a keen little firework. He's my teenage son's dog really and he hasn't trained him not to pull. I have taken the matter into my own hands as it's unpleasant walking a pulling dog but I've bought the head collar and have tried just putting it on him in the house to get used to it and he hates it.. Pulls it off with his paws, rolls on the floor etc until it's off. Am I being optimistic trying to use this at this late stage? When we've used body harnesses, he's escaped from those too. I'm disheartened as I work full time and know that training is important. Any advice most appreciated on the next course of action.